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Immunochemical stains of HtrA2 in tissue microarray-based samples of ovarian serous cell carcinomas ( × 20). Immunohistochemical stains by a rabbit monoclonal antibody for HtrA2 (EPR22; dilution 1 : 100, Abcam) was evaluated. Immunoreactivity was scored according to the staining intensity as follows: weak (0), moderate (1+), and strong (2+). (A) Negative control (NC). (B) Score 0. (C) Score 1+. (D) Score 2+. Scale bar, 100 μm.
